基于DM642芯片的MPEG-2到AVS-M實時轉(zhuǎn)碼系統(tǒng)的設(shè)計與實現(xiàn).pdf

1、哈爾濱工業(yè)大學(xué)（深圳）碩士學(xué)位論文基于DM642芯片的MPEG2到AVSM實時轉(zhuǎn)碼系統(tǒng)的設(shè)計與實現(xiàn)姓名：孫海陽申請學(xué)位級別：碩士專業(yè)：計算機(jī)科學(xué)與技術(shù)指導(dǎo)教師：高文黃慶明20050301：：=：：些塹塑至：：!塵莖三莖堡圭蘭竺簍圣：：：：：AbstractMPEG2compresseddigitalvideocontentisbeingusedinmanyproductsincludingtheDVDs，camcorders，digit

2、alTv，andHDTVWhileMPEG2videoisonlyfitforhighqualitydigitalvideoapplications，itisnotsuitableforlowbitrateapplicationsTheabilitytoaccessthiswidelyavailableMPEG一2contentonlow—powerandmovableend—userdevicessuchasPDAsandmobile

3、phonesdependsoneffectivetechniquesfortranscodingtheMPEG2contenttoalowbitrateandlowspatial／temporalresolutionvideoformattoadapttothelowbandwidthconnectionandthelowpowerdevicesAVS—Mvideocompressionalgorithmisdesignedforlow

4、bitratevideoandhasfeaturesthatenabletrammissionoverwirelessconnectionTranscodingMPEG一2videotoAVS—Mformatneedstheprocessesofreducingspatial／temporalresolutionandconversionbetweendifierentvideoformatswhichCanachievelOWbitr

5、atesimultaneouslyinordertomeettherequirementsofthedisplaysizeand】imitedpowerofmovableterminalsInthisPaDerarealtimetranscoderwhichconvertsframe—encodedMPEG2SDvideotoAVS—MQCIFformatisproposedaccordingtotherelationshipandea

6、chfeaturesofthemAndthetranscoderiSimplementedonTMS320DM642digitalmediaprocessorTheinformationgainedfromthedecodedinputMPEG2codestream，suchasmotionvectorsandcodingpatterns，iSreusedtoachievealow—complexityapproachTheS1MDin

7、structionsetofTIC6000familyDSPisusedtooptimizethetranscoder：Byoptimizingdataaccessandoperationsonasetofdatainparalleltheoperation1evelparallelismiSmaximized；Theinstruction—levelparallelismismaximizedbyoptimizingsoftwarep

8、ipeline；LinearassemblyofC6000iSusedtewritesomeofthecodetoachievefurtheroptimizationbytheassemblyoptimizerAndatlasttherealtimetrancoderisimplemented，whichcanprocessabout45framesofMPEG2SDvideopersecond，andtherequestmentofr